KCD/PeriodicNotifier.swift

   1 //
   2 //  PeriodicNotifier.swift
   3 //  KCD
   4 //
   5 //  Created by Hori,Masaki on 2017/01/03.
   6 //  Copyright © 2017年 Hori,Masaki. All rights reserved.
   7 //
   8
   9 import Cocoa
  10
  11 extension Notification.Name {
  12
  13     static let Periodic = Notification.Name("com.masakih.KCD.Notification.Periodic")
  14 }
  15
  16 final class PeriodicNotifier: NSObject {
  17
  18     private let hour: Int
  19     private let minutes: Int
  20
  21     init(hour: Int, minutes: Int) {
  22
  23         self.hour = hour
  24         self.minutes = minutes
  25
  26         super.init()
  27
  28         let nc = NotificationCenter.default
  29         nc.addObserver(forName: .NSSystemTimeZoneDidChange, object: nil, queue: nil, using: notify)
  30         nc.addObserver(forName: .NSSystemClockDidChange, object: nil, queue: nil, using: notify)
  31         nc.addObserver(forName: NSWorkspace.didWakeNotification, object: nil, queue: nil, using: notify)
  32
  33         notifyIfNeeded(nil)
  34     }
  35
  36     private func notify(_ notification: Notification) {
  37
  38         notifyIfNeeded(nil)
  39     }
  40
  41     @objc fileprivate func notifyIfNeeded(_ timer: Timer?) {
  42
  43         let now = Date(timeIntervalSinceNow: 0.0)
  44         let unit: Set<Calendar.Component> = [.era, .year, .month, .day]
  45         var currentDay = Calendar.current.dateComponents(unit, from: now)
  46         currentDay.hour = hour
  47         currentDay.minute = minutes
  48
  49         if let notifyDate = Calendar.current.date(from: currentDay),
  50             now.compare(notifyDate) == .orderedDescending {
  51
  52             currentDay.day? += 1
  53             NotificationCenter.default.post(name: .Periodic, object: self)
  54         }
  55
  56         if let v = timer?.isValid, v {
  57
  58             timer?.invalidate()
  59         }
  60
  61         guard let nextNotifyDate = Calendar.current.date(from: currentDay) else { fatalError("Can not create time of notify") }
  62
  63         let nextNotifyTime = nextNotifyDate.timeIntervalSinceNow + 0.1
  64         Timer.scheduledTimer(timeInterval: nextNotifyTime,
  65                              target: self,
  66                              selector: #selector(PeriodicNotifier.notifyIfNeeded(_:)),
  67                              userInfo: nil,
  68                              repeats: false)
  69     }
  70 }